[openal] Format clarification

[Miroslav Andel]

Hi,

Are the multichannel formats such as AL_FORMAT_51CHN32, 
AL_FORMAT_61CHN32 and AL_FORMAT_71CHN32 signed 32-bit integers or 32-bit 
floats? Couldn't find any documentation. If they are signed integers is 
there an equivalent for mono and stereo? I could only find 
AL_FORMAT_MONO_FLOAT32 and AL_FORMAT_STEREO_FLOAT32 which are floats.

Best regards,

Miroslav